Erotic novel Reflected in You, by author Sylvia Day, has sold more copies in
its first week of release than EL James's record-breaking 50 Shades of Grey.

A new erotic novel could be about to eclipse the success of EL James's 50 Shades of Grey.

Reflected in You, by 39-year-old Japanese-American author Slyvia Day, has sold over 80,000 paperbacks in the UK on its first six days of release, which is more than 50 Shades of Grey sold in its first full week on sale.

According to figures from Nielsen BookScan, which provides sales data for the book industry, Reflected in You has sold 82,759 in the last week. Only JK Rowling's The Casual Vacancy and Dan Brown's The Lost Symbol have sold more copies in their first week since Nielsen's records began in 1998, according to British publishing industry magazine the Bookseller.

"I think its mega-sale proves two things: one, that the erotica boom is here to stay, and two, that there's still life in the printed book. Reflected in You has been on sale in digital formats for a month already. Despite this, the paperback edition still enjoyed one of the strongest ever opening-week sales for a printed book since records began."

Earlier this year, 50 Shades of Grey – about a virginal heroine who falls for a bondage-loving billionaire – became the biggest selling book in Britain since records began. In August it had sold more than 5.3 copies.

Day's novel, the follow up to her previous bestselling erotic novel Bared To You, also tells of an "intensely romantic" love affair featuring a "damaged and tormented" billionaire.